Gastric mucosa ESD specimen fixing device
The gastric mucosal ESD specimen fixation device with a strut structure solves the problem of tissue damage and tearing during ESD specimen fixation, and achieves safe and reliable pathological diagnosis.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-03-06
AI Technical Summary
In existing technologies, ESD specimen fixation methods can easily lead to tissue damage or tearing of tissue edges, affecting pathological diagnosis.
The gastric mucosal ESD specimen fixation device with a strut structure extends and fixes the ESD specimen during the lid closing process, avoiding the use of fine needles for fixation.
This effectively avoids tissue damage or tearing of tissue edges, ensuring the accuracy of pathological diagnosis.
Smart Images
Figure CN223976961U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of endoscopic submucosal dissection, specifically to a device for fixing gastric mucosal ESD specimens. Background Technology
[0002] Gastric cancer is one of the most common and deadliest malignant tumors worldwide, particularly prevalent in East Asia. Early detection and treatment of gastric cancer are crucial for improving long-term survival rates.
[0003] Endoscopic submucosal dissection (ESD), as a minimally invasive treatment, has become an important method for treating early-stage gastric cancer. The method of fixing ESD specimens is crucial for pathological sampling and diagnosis. Currently, the commonly used method is to lay the ESD specimen flat on a wooden or foam board and fix the dissected tissue edges with fine needles. However, using fine needles to fix the tissue edges can easily cause tissue damage or tearing of the tissue edges, affecting pathological diagnosis. Utility Model Content
[0004] The purpose of this invention is to provide a gastric mucosal ESD specimen fixation device that uses a strut to fix the ESD specimen, thus avoiding tissue damage or tissue edge tearing.
[0005] To achieve the above objectives, this utility model provides a gastric mucosal ESD specimen fixation device, including an embedding box, a lid that can be placed on the embedding box, and multiple support rods rotatably connected to the lid. The bottom of the embedding box is provided with a positioning pin facing the lid, and the positioning pin is located at the center of the multiple support rods.
[0006] The support rod has two position states: initial position and working position. In the initial position, the support rod is perpendicular to the box cover. The end of the support rod away from the box cover is provided with an arc-shaped sliding position, which can slide along the bottom of the embedding box. When the arc-shaped sliding position slides to the farthest point, the support rod is in the working position.
[0007] After the lid is placed on the embedding box, the gap between the top of the lid and the bottom of the embedding box is consistent with the height of the arc-shaped sliding position.
[0008] Preferably, the gastric mucosal ESD specimen fixation device further includes a strut connector, the strut is rotatably connected to the strut connector, and the strut connector is detachably connected to the cover.
[0009] Multiple struts are evenly distributed along the outer periphery of the strut connector.
[0010] Preferably, the strut connector has multiple rotating positions, each corresponding to a strut, and the strut is rotatably connected to the strut connector through the rotating positions.
[0011] Preferably, a damping mechanism is provided between the strut and the strut connector.
[0012] Preferably, the arc-shaped sliding part is set to be spherical or hook-shaped.
[0013] Preferably, the side of the arc-shaped sliding part facing the box lid is provided with a fixing surface, which is set as a horizontal surface and has an area of not less than 1 cm². 2 .
[0014] Preferably, a positioning block is provided on the top of the strut connector, and the cover is provided with a positioning hole that mates with the positioning block.
[0015] Preferably, the positioning hole is square.
[0016] Preferably, the positioning hole is a through hole.
[0017] Preferably, the lid and the embedding box are snapped together.
[0018] According to the above technical solution, before the cover is placed on the embedding box, the ESD specimen that needs to be fixed is first initially positioned by the positioning pin at the bottom of the embedding box. After the ESD specimen is positioned by the positioning pin, the ESD specimen can be extended and positioned by placing the cover on the box.
[0019] The lid has a rotatable support rod on the side facing the embedding cassette, and an arc-shaped sliding part is provided at the end of the support rod near the bottom of the embedding cassette. In the initial position, the support rod is perpendicular to the lid under the influence of gravity. When the lid approaches the embedding cassette 1 and prepares to cover it, the support rod of a certain length will first contact the embedding cassette. After the arc-shaped sliding part at the bottom of the support rod contacts the bottom of the embedding cassette, as the distance between the lid and the embedding cassette gradually decreases, the lid will apply a certain pressure to the support rod. Under this pressure, the arc-shaped sliding part begins to slide along the bottom of the embedding cassette. While the arc-shaped sliding part is sliding, the other end of the support rod rotates relative to the lid.
[0020] Multiple struts are provided, distributed around the positioning pin. When these arc-shaped sliding positions slide, they push the ESD specimen inside the embedding box to extend outwards until the box lid is completely placed on the embedding box. At this point, the gap between the top of the box lid and the bottom of the embedding box is consistent with the height of the arc-shaped sliding position. Under the limiting action of the box lid, the arc-shaped sliding position is fixed between the top of the box lid and the bottom of the embedding box, and the struts can no longer rotate, thus achieving the function of fixing the ESD specimen with the struts.
[0021] The contact point between the arc-shaped sliding mechanism and the embedding cassette is designed with an arc-shaped surface. This arc shape allows the support rod to slide more smoothly along the bottom surface of the embedding cassette. Preferably, the contact area between the arc-shaped surface and the bottom surface of the embedding cassette should not be too large. This is because the contact area affects the extension effect of the arc-shaped sliding mechanism on the ESD specimen. When the contact area is too large, the pushing force per unit area of the arc-shaped sliding mechanism on the ESD specimen will decrease. Therefore, the contact area needs to be set to a smaller size to obtain a better pushing effect on the ESD specimen.
[0022] This gastric mucosal ESD specimen fixation device, by incorporating a strut, can achieve a certain degree of extension of the ESD specimen as the lid closes onto the embedding cassette. Furthermore, once the lid is tightly closed, the specimen is fixed by the limiting effect of the arc-shaped sliding position between the lid and the embedding cassette 1. Using a strut instead of a fine needle to fix the ESD specimen effectively avoids tissue damage or tearing of tissue edges.
[0023] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description
[0024] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0025] Figure 1 This is a schematic diagram of a gastric mucosal ESD specimen fixation device;
[0026] Figure 2 This is a schematic diagram of an embedding cassette.
[0027] Figure 3 This is a schematic diagram of a strut and a strut connector.
[0028] Figure 4 This is a top view of a gastric mucosal ESD specimen fixation device;
[0029] Figure 5 This is a schematic diagram showing the connection relationship between a strut and a strut connector.
[0030] Explanation of reference numerals in the attached figures
[0031] 1 pack of embedding box, 2 boxes of lids
[0032] 3 struts and 4 positioning pins
[0033] 5. Arc-shaped sliding position; 6. Support rod connecting seat
[0034] 7 Rotation position 8 Positioning hole
[0035] 31 major terminals Detailed Implementation
[0036] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.
[0037] In this utility model, unless otherwise stated, directional words such as "bottom," "facing," "away from," "one end," "farthest point," and "outer periphery" contained in the terminology only represent the orientation of the term in its conventional use or are common terms understood by those skilled in the art, and should not be regarded as limitations on the terminology.
[0038] See Figure 1 The aforementioned gastric mucosal ESD specimen fixation device includes an embedding box 1, a box cover 2 that can be placed on the embedding box 1, and a plurality of support rods 3 rotatably connected to the box cover 2. A positioning pin 4 is provided at the bottom of the embedding box 1, and the positioning pin 4 is located at the center of the plurality of support rods 3.
[0039] The support rod 3 has two position states: waiting position and working position. In the initial position, the support rod 3 is perpendicular to the box cover 2. The end of the support rod 3 away from the box cover 2 is provided with an arc-shaped sliding position 5. The arc-shaped sliding position 5 can slide along the bottom of the embedding box 1. When the arc-shaped sliding position 5 slides to the farthest point, the support rod 3 is in the working position.
[0040] After the lid 2 is placed on the embedding box 1, the gap between the top of the lid 2 and the bottom surface of the embedding box 1 is consistent with the height of the arc-shaped sliding position 5.
[0041] By implementing the above technical solution, before the cover 2 is placed on the embedding box 1, the ESD specimen that needs to be fixed is first initially positioned by the positioning pin 4 at the bottom of the embedding box 1. After the ESD specimen is positioned by the positioning pin 4, the ESD specimen can be extended and positioned by placing the cover 2.
[0042] A rotatable support rod 3 is provided on the side of the lid 2 facing the embedding box 1. An arc-shaped sliding position 5 is provided at one end of the support rod 3 near the bottom of the embedding box 1. Initially, the support rod 3 is perpendicular to the lid 2 under the influence of gravity. When the lid 2 approaches the embedding box 1 and prepares to cover it, the support rod 3, of a certain length, first contacts the embedding box 1. After the arc-shaped sliding position 5 at the bottom of the support rod 3 contacts the bottom of the embedding box 1, as the distance between the lid 2 and the embedding box 1 gradually decreases, the lid 2 applies a certain pressure to the support rod 3. Under this pressure, the arc-shaped sliding position 5 begins to slide along the bottom of the embedding box 1. Simultaneously, the other end of the support rod 3 rotates relative to the lid 2.
[0043] Multiple support rods 3 are provided, and the multiple support rods 3 are distributed around the positioning pin 4. When these arc-shaped sliding positions 5 slide, they will push the ESD specimen located in the embedding box 1 to extend in all directions until the box cover 2 is completely covered on the embedding box 1. At this time, the gap between the top of the box cover 2 and the bottom surface of the embedding box 1 is consistent with the height of the arc-shaped sliding position 5. Under the limiting action of the box cover 2, the arc-shaped sliding position 5 is fixed between the top of the box cover 2 and the bottom surface of the embedding box 1, and the support rods 3 can no longer rotate, thus realizing the fixing effect of the support rods 3 on the ESD specimen.
[0044] The contact point between the arc-shaped sliding position 5 and the embedding cassette 1 is set as an arc-shaped surface. This arc shape allows the support rod 3 to slide more smoothly along the bottom surface of the embedding cassette 1. Preferably, the contact area between the arc-shaped surface and the bottom surface of the embedding cassette 1 should not be too large. This is because the contact area affects the extension effect of the arc-shaped sliding position 5 on the ESD specimen. When the contact area is too large, the pushing force per unit area of the arc-shaped sliding position 5 on the ESD specimen will decrease. Therefore, the contact area needs to be set to a smaller size to obtain a better pushing effect on the ESD specimen.
[0045] This gastric mucosal ESD specimen fixation device, through the use of a support rod 3, can achieve a certain degree of extension of the ESD specimen as the lid 2 closes onto the embedding cassette 1. Furthermore, once the lid 2 is tightly closed, the device effectively fixes the ESD specimen by limiting the arc-shaped sliding position 5 through the interaction of the lid 2 and the embedding cassette 1. Using the support rod 3 instead of a fine needle to fix the ESD specimen effectively avoids tissue damage or tearing of tissue edges.
[0046] In this embodiment, the gastric mucosal ESD specimen fixation device further includes a strut connector 6, the strut 3 is rotatably connected to the strut connector 6, and the strut connector 6 is detachably connected to the cover 2.
[0047] Multiple struts 3 are evenly distributed along the outer periphery of the strut connecting seat 6.
[0048] The strut 3 is rotatably connected to the strut connecting seat 6. When the arc-shaped sliding position 5 slides along the bottom surface of the embedding box 1, the strut 3 rotates relative to the strut connecting seat 6 until the box cover 2 is completely covered on the embedding box 1.
[0049] Multiple support rods 3 are distributed along the outer periphery of the support rod connecting seat 6, so that during the process of the cover box 2 covering the embedding box 1, multiple arc-shaped sliding positions 5 can slide in multiple directions in the plane away from the positioning needle 4. After the arc-shaped sliding positions 5 are fixed by the cover box 2 and the embedding box 1, the outer periphery of the ESD specimen can be reliably fixed by multiple support rods 3.
[0050] Multiple struts 3 are evenly distributed along the strut connecting seat 6 so that during the rotation of the struts 3, the arc-shaped sliding position 5 can evenly extend and fix the ESD specimen around its perimeter.
[0051] In this preferred embodiment, the strut connecting seat 6 is provided with a plurality of rotating positions 7, each of which corresponds to a strut 3, and the strut 3 is rotatably connected to the strut connecting seat 6 through the rotating positions 7.
[0052] In one embodiment, in order to achieve a reliable connection between the strut 3 and the strut connecting seat 6, the end of the strut 3 connected to the strut connecting seat 6 is set as a large end 31. The strut connecting seat 6 is provided with a groove that mates with the large end 31. The large end 31 can rotate in the groove, thereby achieving a reliable connection between the strut 3 and the strut connecting seat 6.
[0053] In this embodiment, preferably, the large end 31 is spherical, and the groove is spherical and concentric with the large end 31. The large end 31 can rotate freely in the groove. A rotation position 7 is provided in the groove near the outer edge of the support rod connecting seat 6. The rotation position 7 is a notch that can guide the body of the support rod 3. Preferably, the notch is square in the vertical direction. The large end 31 of the support rod 3 fits into the groove. The body of the support rod 3 extends out through the square notch. Under the restriction of the square rotation position 7, the support rod 3 can only swing on the surface perpendicular to the support rod connecting seat 6, thereby realizing the rotation of the support rod 3.
[0054] The strut 3 points to the center of the strut connector 6, and the center of the strut connector 6 is aligned with the positioning pin 4.
[0055] In this embodiment, preferably, the large end 31 is a cylinder, and the support rod connecting seat 6 has a groove that mates with the cylinder. The large end 32 of the cylinder is coaxially arranged with the groove. The main body of the support rod 3 passes through the rotating part 7 and connects to the large end 31. During the rotation of the support rod 3, the cylindrical large end 31 rotates within the groove.
[0056] In another embodiment, the strut connecting seat 6 and the strut 3 are rotatably connected through the fit of a shaft and a hole. The strut connecting seat 6 is provided with a rotating shaft, and the strut 3 is provided with a rotating hole that fits with the rotating shaft. When the rotating hole of the strut 3 is fitted onto the rotating shaft, the pressure applied by the cover 2 during the closing process can push the strut 3 to rotate around the rotating shaft.
[0057] In this manner, preferably, a damping mechanism is provided between the strut 3 and the strut connecting seat 6.
[0058] By setting damping between the strut 3 and the strut connecting seat 6, the arc-shaped sliding position 5 can provide greater pressure to the ESD specimen during its sliding process, which is beneficial to the extension and fixation of the ESD specimen by the strut 3.
[0059] In one embodiment, damping between the strut 3 and the strut connecting seat 6 is achieved by increasing friction. Preferably, the surface of the rotating part 7 facing the strut 3 and the surface of the strut 3 mating with the rotating part 7 are both made frosted, thereby increasing the friction between the rotating part 7 and the strut 3. Then, during the rotation of the strut 3, the friction between the rotating part 7 and the strut 3 can provide a damping effect to the strut 3.
[0060] In one embodiment, a spring can be provided between the support rod 3 and the support rod connecting seat 6. When the support rod 3 is in the initial position, the spring is in the initial state. When the support rod 3 rotates, the spring is compressed or stretched to generate elastic force, which can provide damping for the support rod 3. The spring can also help the support rod 3 return to its original position. When the cover 2 is opened, the support rod 3 can quickly return to its initial position under the action of the spring force.
[0061] After ESD specimens are fixed in formalin for several hours, the tissue hardens and sets. Therefore, when the lid 2 is opened, the ESD specimen, having already hardened, will not curl up after losing its fixation. Similarly, a spring is provided to help the support rod 3 return to its original position after the lid 2 is opened. During the return process, the support rod 3 slides along the surface of the ESD specimen, and this sliding process does not affect the state of the ESD specimen.
[0062] In this embodiment, preferably, the arc-shaped sliding part 5 is set to be spherical or hook-shaped.
[0063] To facilitate the sliding of the arc-shaped sliding position 5 at the bottom of the embedding box 1, the arc-shaped sliding position 5 can be set as a sphere or a hook shape. The relative sliding and rotation of the spherical or hook-shaped arc surface with the bottom of the embedding box 1 can achieve a smoother sliding effect of the support rod 3. Moreover, the arc-shaped contact surface can also achieve reliable protection of the ESD specimen.
[0064] Preferably, the side of the arc-shaped sliding part 5 facing the box cover 2 is provided with a fixing surface, which is set as a horizontal surface and has an area of not less than 1 cm². 2 .
[0065] With the fixed surface facing the top of the cover 2, as the support rod 3 rotates, the arc-shaped sliding position 5 gradually moves away from the positioning pin 4, and the distance between the cover 2 and the embedding box 1 also gradually decreases. When the cover 2 is closed in place, the top of the cover 2 just presses on the positioning surface of the arc-shaped sliding position 5, and the bottom of the arc-shaped sliding position 5 presses on the bottom surface of the embedding box 1. In this way, the arc-shaped sliding position 5 can be effectively limited, ensuring that the ESD specimen can be reliably pressed by the support rod 3.
[0066] In this embodiment, preferably, a positioning block is provided on the top of the support rod connecting seat 6, and the cover 2 is provided with a positioning hole 8 that cooperates with the positioning block.
[0067] The detachable connection between the support rod connecting seat 6 and the cover 2 can be achieved by the cooperation of the positioning block and the positioning hole 8. Preferably, the size of the positioning hole 8 is set to be slightly smaller than that of the positioning block, so that after the positioning block is installed into the positioning hole 8, a reliable connection between the support rod connecting seat 6 and the cover 2 can be achieved.
[0068] In this embodiment, preferably, the positioning hole 8 is square.
[0069] The positioning hole 8 is set to be square, so that after the positioning block is engaged with the positioning hole 8, the relative position of the support rod connecting seat 6 and the box cover 2 is determined, and the support rod connecting seat 6 no longer has any other degrees of freedom relative to the box cover 2.
[0070] In this manner, preferably, the positioning hole 8 is configured as a through hole.
[0071] The positioning hole 8 is a through hole. When the support rod 3 needs to be removed, the positioning block inside the positioning hole 8 can be pushed out from above the box cover 2.
[0072] The lid 2 is snapped between the box and the embedding box 1.
[0073] During the process of covering the box 2, the box 2 needs to be raised and lowered in a direction perpendicular to the embedding box 1. The support rod 3 needs to slide as much as possible while sliding along the bottom of the embedding box 1, while avoiding rotation of the arc-shaped sliding position 5, so as to prevent the arc-shaped sliding position 5 from tearing the ESD specimen when extending the ESD specimen.
[0074] By setting the lid 2 to snap between the box and the embedding box 1, the lid 2 can be placed over the embedding box 1 without rotating it.
[0075] In one embodiment, a wedge-shaped buckle is provided at the lower end of the cover 2, and a boss that engages with the wedge-shaped buckle is provided at the upper end of the embedding box 1. During the process of covering the cover 2 downward, the boss will squeeze the wedge-shaped structure. Therefore, the cover 2 will deform during the downward movement of the cover 2. After the wedge-shaped structure passes the boss, the wedge-shaped structure retracts to the bottom of the boss under the elastic force of the deformation of the cover 2 and engages with the boss, thereby achieving reliable fixation of the cover 2 to the embedding box 1.
[0076] Preferably, in order to facilitate opening the cover 2, multiple protrusions can be intermittently arranged along the circumference of the embedding box 1, and multiple wedge structures can also be intermittently arranged along the circumference of the cover 2. The gap between two adjacent protrusions is not less than the width of the wedge structure, and the wedge structure is used to set the protrusions one-to-one.
[0077] When the lid 2 is placed downwards, the wedge structure can be aligned with the boss. After the lid 2 is restored to its original shape, the wedge structure and the boss will lock together. When it is necessary to open the lid 2, the lid 2 can be rotated slightly so that the wedge structure can exit through the gap between the two adjacent bosses, and the lid 2 can be opened easily.
[0078] In one embodiment, the lid 2 is provided with a buckle, which is rotatably connected to the lid 2. The embedding box 1 is provided with a protrusion that cooperates with the buckle. After the lid 2 is in place, the buckle is rotated to the bottom of the protrusion, and the lid 2 and the embedding box 1 are fixed together.
[0079] Preferably, a guide structure is provided between the lid 2 and the embedding box 1, which can restrict the movement of the lid 2 in the vertical direction.
[0080] One embodiment is that the lid 2 is provided with a guide rod, and the surface of the embedded box 1 that mates with the lid 2 is provided with a guide groove. The guide groove and the guide rod work together to realize the lifting and lowering movement of the lid 2 in a fixed direction.
[0081] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.
[0082] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.
[0083] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.
Claims
1. A gastric mucosa ESD specimen fixing device, characterized by, The embedding box (1), the box cover (2) capable of being covered on the embedding box (1), and a plurality of supporting rods (3) rotatably connected with the box cover (2) are included, and the bottom of the embedding box (1) is provided with a positioning needle (4) facing the box cover (2), and the positioning needle (4) is located at the center position of the plurality of supporting rods (3); The supporting rod (3) is provided with two position states: initial position and working position, when the initial position, the supporting rod (3) is perpendicular to the box cover (2); The end of the supporting rod (3) away from the box cover (2) is provided with a circular arc sliding position (5), the circular arc sliding position (5) can slide along the bottom of the embedding box (1), and when the circular arc sliding position (5) slides to the farthest position, the supporting rod (3) is in the working position; After the box cover (2) is covered on the embedding box (1), the gap between the top of the box cover (2) and the bottom surface of the embedding box (1) is consistent with the height of the circular arc sliding position (5).
2. The gastric mucosal ESD specimen fixing device according to claim 1, characterized by, The gastric mucosa ESD specimen fixing device further comprises a supporting rod connecting seat (6), the supporting rod (3) is rotatably connected with the supporting rod connecting seat (6), and the supporting rod connecting seat (6) is detachably connected with the box cover (2) The plurality of supporting rods (3) are uniformly distributed along the outer periphery of the supporting rod connecting seat (6).
3. The gastric mucosal ESD specimen fixation device according to claim 2, characterized by, The supporting rod connecting seat (6) is provided with a plurality of rotating positions (7), the rotating positions (7) are correspondingly arranged with the supporting rods (3), and the supporting rods (3) are rotatably connected with the supporting rod connecting seat (6) through the rotating positions (7).
4. The gastric mucosal ESD specimen fixing device according to claim 3, characterized by The damping is arranged between the supporting rod (3) and the supporting rod connecting seat (6).
5. The gastric mucosal ESD specimen fixation device according to claim 1, characterized by, The circular arc sliding position (5) is provided in a spherical shape or a hook shape.
6. The gastric mucosal ESD specimen fixing device according to any one of claims 1 to 5, characterized by The fixed surface of the circular-arc sliding surface (5) facing one side of the box cover (2) is arranged as a horizontal surface with an area not less than 1 cm 2 .
7. The gastric mucosal ESD specimen fixation device according to claim 2, characterized by, The top of the supporting rod connecting seat (6) is provided with a positioning block, and the box cover (2) is provided with a positioning hole (8) matched with the positioning block.
8. The gastric mucosal ESD specimen fixation device according to claim 7, characterized by, The positioning hole (8) is provided in a square shape.
9. The gastric mucosal ESD specimen fixation device according to claim 8, characterized by, The positioning hole (8) is provided as a through hole.
10. The gastric mucosal ESD specimen fixation device according to claim 1, characterized by, The box cover (2) is clamped between the embedding box (1).